vandalism破坏公物的行为;
graffiti涂鸦;
judge法官;
gang(犯罪)团伙;
sent them to prison送他们入狱;
criminal damage刑事损害;
maximum sentence最高刑罚;
got off lightly(被)从轻判决;
got nine months被判九个月的徒刑;
youth detention centre少年拘留所
